Răspunsuri

2014-08-17T18:10:07+03:00
1)3x  > 4+2
3x > 6

x > 2   => x=(2;α)

2)2x-10  < -3
2x < -3+10

2x < 7 |:2

x < 7/2     => x=(-α; 7/2)

3)9-x² - 6 =2

-x² +3=2

-x² = 2-3

-x² = -1

x²=1   =>x=1